Porcelain thickness and cement shade effects on the colour and translucency of porcelain veneering materials.

摘要: a b s t r c Objective: Purposes of this in vitro study include evaluating colour changes combinations feldspathic porcelain and cement resulting from different thicknesses shades composite luting agent, relative translucency parameter (RTP) values. Materials methods: Porcelain discs shade A1 at nominal 0.5 1.0 mm were bonded to cements three factorial design. Colours calculated for CIE D65 Illuminant Standard Human Observer on black, grey white backings. A difference (CD) was each possible pair thickness values the same thickness. RTP analyzed by ANOVA selected pairwise comparisons. Results: All mean CDs studied perceptible most or greater than clinical acceptability threshold, with notable exception that their confidence limits below threshold change when utilizing Clear shade. Variation resin will result which are near beyond acceptability. decrease did significantly increase studied. Conclusion: Changes may adversely affect basic aesthetic properties these materials. Development methods analyzing effects over ranges materials would improve prognosis using